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Finding the Fourth Proportional to 111,910.10, 167,865.15 and 86,540.90

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Solution

The fourth proportional to 111,910.10, 167,865.15 and 86,540.90 is: 129,811.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,910.10 : 167,865.15 = 86,540.90 : x
  2. Step 2: Convert to fraction form
    111,910.10/167,865.15 = 86,540.90/x
  3. Step 3: Cross multiply
    111,910.10x = 167,865.15 × 86,540.90
  4. Step 4: Simplify right side
    111,910.10x = 14,527,201,159.64
  5. Step 5: Solve for x
    x = 14,527,201,159.64/111,910.10
  6. Step 6: Final answer
    x = 129,811.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.